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1. (WO2013153490) FAULT DETECTION, LOCALIZATION AND PERFORMANCE MONITORING OF PHOTOSENSORS FOR LIGHTING CONTROLS

Pub. No.:    WO/2013/153490    International Application No.:    PCT/IB2013/052698
Publication Date: Fri Oct 18 01:59:59 CEST 2013 International Filing Date: Fri Apr 05 01:59:59 CEST 2013
IPC: H05B 37/02
Applicants: KONINKLIJKE PHILIPS N.V.
Inventors: BIRRU, Dagnachew
WANG, Tianqi
Title: FAULT DETECTION, LOCALIZATION AND PERFORMANCE MONITORING OF PHOTOSENSORS FOR LIGHTING CONTROLS
Abstract:
A method and system for monitoring sensors of a lighting control system. The method comprises performing a training of a plurality of sensors of the lighting control system (210) to determine a joint probability distribution function (PDF) of the illuminance at a given time t; collecting parameters from the training and storing the parameters in a prior data storage (S212); observing illuminance of the plurality of sensors (S222); determining if there is at least a faulty sensor from among the plurality of sensors based in part on the parameters stored prior data storage (S224); and locating a faulty sensor based on the determination of the existence of the at least a faulty sensor and the prior data (S232, S234).